[Webkit-unassigned] [Bug 67581] New: REGRESSION: toggling display of lots (thousands) of elements with display:none is very slow

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=67581

           Summary: REGRESSION: toggling display of lots (thousands) of
                    elements with display:none is very slow
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mikelawther at chromium.org


As reported at http://crbug.com/94248 :

1.  Create a bunch (2000 table rows) of elements
2.  Hide them using CSS (display:none)
3.  Show them using CSS (display:none)

See attached file (showhide.html) for repro.

Safari Version 5.0.4 (6533.20.27) (MacOS 10.6) - takes approx 1 sec to toggle

WebKit Nightly r93043 (MacOS 10.6) - takes > 30 secs to toggle
Chrome 15.0.865.0 dev (MacOS 10.6) - takes > 30 secs to toggle

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